Tadzhikite-(Ce)

General Information:
 Chemical Formula:
Ca3(Ce,Y)2(Ti,Al,Fe+++)B4Si4O22
 Composition:
(Molecular Weight = 924.84 gm)
Calcium 13.00 % Ca
Cerium 22.73 % Ce
Yttrium 4.81 % Y 
Titanium 3.11 % Ti
Aluminum 0.88 % Al
Iron 0.60 % Fe
Silicon 12.15 % Si
Boron 4.68 % B 
Oxygen 38.06 % O 
 Empirical Formula:
Ca3Ce1.5Y0.5Ti0.6Al0.3Fe3+0.1B4Si4O22
 IMA Status:
Approved IMA 1987
Physical Properties:
 Cleavage:
[010] Distinct
 Color:
gray brown or reddish brown.
 Density:
3.73 - 3.86, Average = 3.79
 Diaphaniety:
Translucent
 Hardness:
6 - Orthoclase
 Luster:
Vitreous (Glassy)
 Streak:
white
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